ARM: rmobile: Increase malloc area size

Increase the malloc area size significantly to cater for bounce buffer
used by the SDHI driver.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Peng Fan <peng.fan@nxp.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: Tom Rini <trini@konsulko.com>
diff --git a/include/configs/rcar-gen3-common.h b/include/configs/rcar-gen3-common.h
index 6528f1f..8f400ba 100644
--- a/include/configs/rcar-gen3-common.h
+++ b/include/configs/rcar-gen3-common.h
@@ -47,7 +47,7 @@
 
 #define CONFIG_SYS_MONITOR_BASE		0x00000000
 #define CONFIG_SYS_MONITOR_LEN		(1 * 1024 * 1024)
-#define CONFIG_SYS_MALLOC_LEN		(1 * 1024 * 1024)
+#define CONFIG_SYS_MALLOC_LEN		(64 * 1024 * 1024)
 #define CONFIG_SYS_BOOTM_LEN		(64 << 20)
 
 /* The HF/QSPI layout permits up to 1 MiB large bootloader blob */